Real-time Implementation of Synchrophasor Based Linear State Estimator in OPAL-RT HYPERSIM

Abstract

Real-time monitoring of system behavior is an integral part of modern power system operation and control. With the increasing demand, it is becoming critical and very essential to monitor system states for quick decisions to prevent the cascading blackout. Availability of phasor measurement units (PMUs) has been proven a cornerstone for real-time monitoring of the system at some of the specific locations, where these devices are placed. However, higher cost and required communication infrastructure limit the placement of PMUs at some optimal places only. Although many research works have been done for PMU based linear state estimator (LSE), online implementation and validation of various estimation algorithms at control centers are yet to be fully established. This paper presents the systematic procedure of digital simulation in the OPAL-RT HYPERSIM, generation of the IEEE C.37-118 protocol compliant synchronized measurements, and validation of state estimation algorithms in the real-time environment.